Scribe Full-Width Page

I am using the Scribe theme with a table and would like the width of the workable area of the page to be greater than 690px. I would like to move the margin more to the left to allow for a full table to be shown in the page.

The page is here:

http://extra.roselleparknews.net/board-of-education-attendance-record-2016/

Thanks.