Adjusting position of mobile nav menu

I’m having trouble adjusting the position of the nav menu on mobile devices. I’m trying to get the menu to move down a few pixels to avoid some overlapping that occurs. I’m able to reposition it in the properties panel but it doesn’t view correctly on preview or published version of the site. I’ve attached an image of the setting and the results (or non-results) of the published view.

Preview link:

Published link: