Well, if your location is near 84.716306W, 83 would nearly be your "south Satellite". I'd watch 3805 V 4166 (DVB-S)
AMC 9 at 83.0°W - LyngSat and very carefully adjust the elevation for Q.(a ¼ turn can make all the difference on S2 signals) If unable to aquire Q there I'd move to 87W.
72W - watch 3937 V 2825 (DVB-S2)
AMC 6 at 72.0°W - LyngSat If touching up the elevation on 83 (87) doesn't bring this one in, think I'd go further to the side and touch up azimuth. (at the sides, the actuator does the Up/Dn, so only adjust the mount "twist" on the pole.) After that I'd go back to 84 and double check the Q there. If it needs adjustment, also recheck at the ends of the arc. If that don't do it suspect that the declination setting is off.
All of this may be for naught tho- I have the 3937 @ 72W at 83 Q, but I'm half way across the country. Is this TP weak in your "neck of the woods"? May need to confirm with members closer to you.
Another practice is to enter these freqs according to a average difference that your setup blind scans at. Mine will usually blind scan TP's 2mhz higher than the published freqs. So often, I have to manually enter them 2mhz higher than what is reported to scan in some of the weaker TP's.
Maybe you're not at the center of the peak? I have a hard time using Peak Q on my Openbox.As the Q meter likes to "top out" at 70. I've found it much more accurate to "count turns". Find the signal, and go past peak to a lower reading that I use as a reference. Then go past the peak to the reference level on the other side, counting turns. Divide by two, to move the dish back to the center of the peak.