If you visit:

simpleschoolfundraising.com/faq/

you will find the FAQ feel like they are centered on the page, though the shortcode is aligned left in the editor.

Advice on moving the content more to the left-hand margin?

Dear James,

Thanks for dropping us a line.
If you have the FAQ on the provided link only,

then try to add the following CSS code

.post-16#content1{
margin-left:150px;
}

You may add !IMPORTANT if needed too.

Let us know if that worked.

Didn't work for me.

Dear James,

In that case, please write us at [email protected] sending us admin credentials of your website and we'll solve this issue.

Please do mention this forum post's URL in the subject line of your email.