Complex sentence: At this championship he was the first ever to achieve an overal total points, below 160.000: 159.356 was the new Allround World Record, the stood firm for 4 years, before being broken by Johann Olav Koss.
Split into simpler sentences: At this championship he was the first ever to achieve an overall point total below 160.000: 159.356 was the new Allround World Record. This record stood firm for 4 years before being broken by Johann Olav Koss.