After resizing my picture to 950px using picresize I was noticing this:
see the extra white on the right of the image? My previous header did the same thing. Here's how to fix it. Open Blogger and go to the Design tab.
Then click on the Template Designer.
On the left hand side click on the Adjust Widths tab.
Where it says Entire Blog you want to change the pixel number. What I found to work is 20 more than the pixel size I resized my picture to on the picresize website.
Make sure you click Apply to Blog and you are done. Here is my new header:
I hope that this will help someone!