Main menu drop downs

Hello - The drop down on the last item of my menu are all being cut off where the front section ends and the background begins. I've created a "dummy" menu item at the end but it's still not pushing the menu items over to the left enough to prevent this from happening. Any thoughts?

 

Please share the link of your website.

 

Thanks for your reply. Here is the link:

http://www.abigailadamsbirthplace.com/wordpress/