A flloating belly button means that you have the belly button disconnected where it attaches at the muscle and then relocated lower and stitched back down to the muscles. This does not do anything to the external appearance of the belly button. The belly button should only be moved a few inches to keep its appearance and location natural.
Hello, floating belly button means detaching it from the underlying muscle/connective tissue layer so when the tummy tuck is performed, it moves independently.