3ds Max Animation :: Text Shape Dynamic Text

I have a Text Shape which dynamically changes it's value to represent the x coordinate value when a box is translated on the x axis. I achieved this via script controller attached to the box object. This works perfectly, however I need to keep the position of the decimal point in the same place as the coordinates changes but because the value and hence it's length changes, it's position changes accordingly. For example if the value is 3.141 and this changes to 3.14 the decimal point moves to the right slightly as the length of the text shape updates.