The distance to the impact point will increase the inertia and therefore the force of the impact. The impact however does not change in the biomechanics but just increases the forces that then create more injury. You would not generally cause a herniation with this maneuver but fracture bone and tear disc.
Unfortunately, you cannot “punch” a disc back into place or I would be taking karate lessons.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.