Just manually change the axis to fixed .
Click on edit axis when you right click Revenue axis.
Select Fixed Radio button. and then manually type in 100 to Fixed End.
This should help.
i can change the full revenue bar to fixed and it will make all extend to beyond the graph. so it appears they are all the same length
but that does not to show the sleected customers position, relative to everyone else.
I think that could skew the actual goal though.
If i do a fixed max as you posted, it creates the following problem.
Product A. Group max revenue 200. Customer revenue 180.. Should show up near top of the bar
fixed max is same across all products. So 400. For product A, customer shows up as below average