Arras 1.5.1.2 Re-design. Moving content and sidebar

Hello guys,
I have a small problem with my website and I could really use some help. I’m sure the solution is quite simple; however, I’m not a WordPress guru.

So, my website (https://vgfaq.com/) uses Arras 1.5.1.2. Now, what I want to do is to move the content area along with the right sidebar, to the right. In other words, I want it to float all the way to the right, and the empty space should be on the left side.

The changes should affect only the right side bar and the content area. Not the main header, not the footer or the front page.

Could you please assist me?

Thank you,
Vlad