Micro USB B Pick-n-Place info
Altium (by default) exports both coordinates to the PnP file. "Mid-X, Mid-Y" (yellow coordinate system) and "Ref-X, Ref-Y" (blue coordinate system). But, from my experience, it doesn't really matter, because the operator needs to set up the pick up point and placing point manually for all the "unusual/not rectangular" parts.
And, if you have both coordinates in PnP file, they can use the one that they prefer.

When it comes to rotation, if you can, try to use the one that you see on the "tape and reel" drawing in the datasheet. On all the machines I worked with, this was considered the "zero rotation" (tape going "up" and sprocket holes on left):