Always be sure to fully back up your blog before attempting a move.
Many times, new bloggers might put their blog in a subdirectory, like /blog or they did not realize that when you install WordPress manually, it will be installed in the /wordpress directory. If this is the case and you want to move your blog out of a subdirectory and into the root folder of your site (i.e. you domain name), then follow the instructions in the video below.
If you have any questions, please comment below.