Moving Search Bar

Hi there! Last night, I unintentionally removed the search bar that is standard with the Marla theme (I think I removed it, anyway). I’ve figured out how to get a search bar back on my page, but instead of being on the far right side of the page, it is now on the far left. I would prefer for it to be on the far right side, as it originally was, but have no idea how to do this. Any help would be very much appreciated!
For reference, my url is http://www.diaryofaformerlyfatgirl.com
Thanks very much!