To set paragraph properties contained on 3-5th tab see Text.
rtGraphic:
Label - caption either text or formula
PicHeight - dimension in pixels (upon insert, PicHeight contains default width that can be used to calculate percentage)
PicWidth
Note: Freeform Hotspots below are not supported. In case they are present they are preserved and can not be simply removed.
"Text Wrap" is an editing feature to change the position once - is not an image property.