Do taller people have a longer horizontal jump?
If you mean in terms of vertical leap then the shorter person
will most likely have a higher vertical because of a lower center
of gravity and more body control. In terms of touching the highest
point of a wall or something then the taller person will most
likely get higher because their wingspan will be much longer
resulting in a significantly higher standing reach. So the shorter
person would have to jump a lot higher to come close to touching
the same spot.