Render blocking javascript

HI, I have been advised to look at some page insighed of why our page is taking so long to load etc, and one of the items comes up as the following
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 30 blocking script resources and 21 blocking CSS resources. This causes a delay in rendering your page.

Some of these are to do with plugins but some mention the theme – what would you advise? I am new to wordpress still and not even sure how to edit the html to move these:
http://www.generatorservicing.com/…tgen/modules/ajax/static/ajax.js?ver=4.0
http://www.generatorservicing.com/…-includes/js/jquery/jquery.js?ver=1.11.1
http://www.generatorservicing.com/…s/jquery/jquery-migrate.min.js?ver=1.2.1
http://www.generatorservicing.com/…n/modules/ajax/static/persist.js?ver=4.0
http://www.generatorservicing.com/…gen/modules/ajax/static/store.js?ver=4.0
http://www.generatorservicing.com/…modules/ajax/static/ngg_store.js?ver=4.0
http://www.generatorservicing.com/…ns/jetpack/_inc/postmessage.js?ver=3.1.1
http://www.generatorservicing.com/…/jetpack/_inc/jquery.inview.js?ver=3.1.1
http://www.generatorservicing.com/…/_inc/jquery.jetpack-resize.js?ver=3.1.1
http://www.generatorservicing.com/…htbox/static/lightbox_context.js?ver=4.0
http://www.generatorservicing.com/…nt/themes/enfold/js/avia-compat.js?ver=2
http://www.generatorservicing.com/…Slider/static/js/greensock.js?ver=1.11.8
http://www.generatorservicing.com/…slider.kreaturamedia.jquery.js?ver=5.3.1
http://www.generatorservicing.com/…/js/layerslider.transitions.js?ver=5.3.1
http://www.generatorservicing.com/…ck/modules/photon/photon.js?ver=20130122
http://www.generatorservicing.com/…uery/ui/jquery.ui.core.min.js?ver=1.10.4
http://www.generatorservicing.com/…ry/ui/jquery.ui.widget.min.js?ver=1.10.4
http://www.generatorservicing.com/…uery/ui/jquery.ui.tabs.min.js?ver=1.10.4
http://www.generatorservicing.com/…s/business-contact-widget.min.js?ver=1.0
http://www.generatorservicing.com/…jquery.form.min.js?ver=3.51.0-2014.06.20
http://www.generatorservicing.com/…-form-7/includes/js/scripts.js?ver=4.0.1
http://s0.wp.com/…ontent/js/devicepx-jetpack.js?ver=201444
http://s.gravatar.com/js/gprofiles.js?ver=2014Octaa
http://www.generatorservicing.com/…ugins/jetpack/modules/wpgroho.js?ver=4.0
http://www.generatorservicing.com/…p-content/themes/enfold/js/avia.js?ver=3
http://www.generatorservicing.com/…ent/themes/enfold/js/shortcodes.js?ver=3
http://www.generatorservicing.com/…popup/jquery.magnific-popup.min.js?ver=2
http://www.generatorservicing.com/…ediaelement-and-player.min.js?ver=2.15.0
http://www.generatorservicing.com/…/mediaelement/wp-mediaelement.js?ver=4.0

??

Thanks