FontCreator only works with funits. It’s up to you to decide how many funits you need to get glyphs of the desired height at a given point size. One inch is 72 points, but a 72 point font does not usually have 1" high capital letters. Compare some different fonts at 120 points in a drawing or DTP application where you can set accurate guide lines at 1"
The scale factor for importing vector based images is set in Tools, Options, Glyph.
