I have a home run coming into my master bedroom. When I checked the voltage it showed 85v instead of 120 and the I checked a power wire in the same box feeding a plug and it showed 15v and when I checked their voltage together it showed 98v. Could there be a small nail through those two wired at some point?
Any time I measure an undervoltage like that I immediately suspect a broken or floating neutral wire. This is potentially hazardous because it means other outlets and devices in the same house may be seeing an overvoltage.
If you are confident that you have measured those voltages accurately, then all the electrical service in your house may be dangerous. The safest thing to do is turn off the main circuit breaker and call a licensed electrician.