isolate the word "TALLER" using crop.
in your "effects controls" uncheck "uniform scale"
at the top of the effects tab select the word "motion".
you will see a cross hair in the middle of the screen.
place the bottom of the word Taller on the cross hair.
in the motion tab move the word up so that it is level with your other words.
change "scale height" and the word will grow but it's base will stay in the same place.
you can animate this so the word will grow.