Hey Ben,
What is your goal by offsetting the point cloud? There isn't an offset point cloud feature in TBC. If you are looking to create an offset surface from the original point cloud you might consider using the "Scan to CAD" feature to create a set of CAD points from the point cloud. From here you can offset the CAD points in whatever direction you want using the "Move Objects" command. There are other tricks to do this but this is the simple one in my opinion.
Cheers,
Riley