[Plugin: Simple Responsive Images] shrinking image leaves gap between header and nav bar

I’m using a Genesis framework theme, and can resize the image to fit the mobile screen, but it then leaves a huge gap between the header image and the nav bar under it. The code has a min-height:200px which i think is causing the gap. When I change that line to a smaller number, the header is too small on a desktop screen. Will the plugin allow the image to resize and the nav bar to move up right under the image?

website is http://daddyostrut.com/

http://wordpress.org/extend/plugins/simple-responsive-images/