Your lifts are horribly out of proportion. Do you have massive thighs and spindly little T-Rex arms? I'd say you might not be squatting to depth, but even the deadlift at 345 is miles ahead of a 160 bench and a 105 press. (That said, pressing 65% of your bench is pretty typical, so the upper body lifts seem proportional to each other at least).
I'm assuming you're a guy. If you're a woman, disregard the above and pat yourself on the back on some impressive lifts. But how big a guy are you? If you weight 150 lbs, you're probably stalling because you've exhausted your novice gains. If you're 220, not so much.
The issue with deadlifts is that they're really taxing on the CNS and require extra recovery time. If you're going to make an adjustment, do them less often. Stick to the 1 x 5, but maybe only every other week.