I am trying to create a tee shirt transfer.
This isn't something that Word can do by itself. If you have an inkjet printer,
though, many of them include it in their driver software.
In Word's Print dialog, click the Properties button next to the printer's name
to get a dialog supplied by the printer driver. Look through the controls there,
or use the Help if there is any, to see if there's something labeled "T-shirt
transfer" or "mirror image" or "flip horizontal".
If that isn't available, and if you have PowerPoint, try creating the page there
and using Flip Horizontal. See
http://www.gmayor.com/rotate_text.htm.