Editing basic page

Long ago I set up the pages at my site and am able to edit them except for one part. All of the pages have a section on the right side showing my picture and then below it giving some links to a blog and other organizations. If I try to edit the Home page that part not accessible and I can’t figure out how to edit that part.
Any suggestions much appreciated.

The page I need help with: [log in to see the link]