Increasing nav menu when menu items are on 2 lines

Hi,
I’ve increased the depth of my nav menu to 70px because the nav titles are on 2 lines
#top #header_main_alternate {
height: 70px
}

I’ve used the span.menu-break to get the menu items onto 2 lines.
span.menu-break {
display: block;
line-height: 0;
bottom: 5px;
position: relative !important;
}

But the drop down menu does not now line up with the bottom of the menu bar. It still appears in its original position.
Also I have an image below the nav menu bar and this is being covered by the nav bar.

Have I targeted the wrong nav bar menu container?

I’m working on localhost but have screengrabs if they are of use?

Regards,
hughsieg5