[Chaser Xaviour]

I had to enlargen an image to find the anchor point.
This allowed me to move the position of the anchor point before resizing it to its original size.
Using the 100% option for W and H
However this doesnt keep the anchor point.
So I drawn a line that would appear outside of the image & then with my new image, adusting the anchor point was easy but when converting the image to 3d made no difference with the anchor point.
By then selecting the image it would give me the message:
Tranfering a 3D layer requires converting it to a smart object layer.
This didnt work for me either so instead I decided to select the image using the line technique above to make the central anchor point, where I wanted the anchor point to be.
This takes a bit of perseverance but instead of trying to line up the selected area with the point you want to anchor, instead, move the image to the central point with the background layer as your guide.
This will allow you to adjust the position of the anchor point.