Fix wordpress header image layout

I just had a header image made for my blog, but am having trouble adding to the blog, the issue, as you can see in the attached image. When adding the header image all the navigation tabs (except for the home tab) and the rest of the header nav bar are hidden. I think the solution is a CSS fix. What i want is for the rest of the top navigation images, as shown in the second image, and bar are shown on top of the header image.