Webpage cut itself in half…

Hello!

After updating all plugins/themes and changing 3 pages to private, I viewed the active site and the entire site seems to have been cut in half. None of the headers, backgrounds, videos, or content go the full length of the browser window. I have not touched any sizing or code.

I was unable to find another forum that covered this issue, but if I missed it I apologize for the reposting!

Any suggestion, solutions or advice you can give would be greatly appreciated.