How tall is the mount?
What is the length of the TV mount from the floor to the top where the TV goes? Can you lower or extend the height of the mount?
Hard to answer the first question since that's dependent on your TV's height. You can't extend the height of the mount beyond what it's intended for but it can be easily raised and lowered. I have a 47" TV mounted on this and it's at the lowest height; the highest setting would account for an additional 6 inches.