Distance wheelies
To travel farther on the back wheel of a bicycle, the rider must put the bike into a higher gear with the body weight leaned forward (over the handle bars if needed) and the stronger foot highest in the pedalling cycle. The rider kicks hard with the stronger foot, throw all their weight backwards and lands their backside on the seat, then straighten out the arms and put weight and tension on them. The rider keeps pedalling, and when the wheelie feels too high up, feathers the back brake slightly.
To lower the “balance point”, put the saddle higher up, which will mean that the “maximum height” of the wheelie is brought down, and it will also be more comfortable to go for long distances on the back wheel. There is a skill to being able to stop on the back wheel, and then keep going more slowly, this can be done by striking a balance between the back brake and the pedalling.