You have to remember that high and low are relative to the distance at which you wish to engage.
Between the muzzle and your target, the bullet may be anywhere along 3 different phases of its trajectory.
Due to the parallax between the bore and your scope or sights, the bullet first travels below the line of sight.
Then eventually it will cross that line of sight, and travel above it.
Then it will again re-cross that line of sight and for the rest of its flight travel below it, more and more, until ultimately after several miles it will plung into the ground.
How you sight-in the rifle all depends on what distance you plan to hit/engage the target.
From the looks of your target impacts, I would guess that your sights/scope are presently set at 1 inch low and 1/2 inch to the left for this particular distance. Just a guess, based on eye-balling the extremes of your impacts.
However after throwing out about half a dozen of the most extreme impacts, then it looks like your sights/scope are presently set a 1 inch low and 1/2 inch to the right.
Hard to say with this target impact data.
If you try this again, at 200 yards, 100 yards, 50 yards, and 25 yards, that would give you more data about parallax and sighting.