positioning a sidebar is primarily a CSS problem, i.e. not WordPress specific.
start by using a browser inspection tool to get a better idea about how the site is formatted right now.
or consider to ask at a CSS forum like http://csscreator.com/forum
to get anybody here to look into your problem, the sidebar needs to be integrated and visible in your example link.
Thanks for your help alchymyth! I have adding the sidebar in to be viewed. I have also figured out the css controlling the behavior but for some reason adding the code to my child theme style.css does not take effect. I add it to my style.css file but when I inspect the page the code doesn’t change. Any ideas about that? I could certainly just change the parent style.css but I’d rather keep the integrity of the client’s original theme (which was not created by me). Thanks again for your help!