highlight text animation - right to left

[kenswift]

I am working on a video that highlights text in an image, in sync with audio.

I have been able to create the desired effect where the shape grows from 0% to 100% (left to right) by using the method in this video, using the shape settings on a graphic, where 'horizontal scale' transforms from 0 to 100 using keyframes.

However, since the text is in arabic script, I'd like to grow the shape from right to left.

I tried to drag the keyframes around, which resulted in the shape decreasing from 100% to 0, starting out on the right. But I'd like to grow it instead: from 0% to 100%, starting on the right. Is this even possible using just Premiere Pro?

[kenswift]

Well, I found out, with a little help from another topic in this group.

The shape I created has an anchor point, which by default is located on the left-top of the shape. I dragged it to the right-top. 
Then I added two keyframes, where initially the shape horizontal scale is zero, and towards the end it's 100.

Now it works!