Perfectly normal as long as it doesn't start dropping much more like a lot of us
We higher miler boys have a dodgy thermostat which means temps on the gauge can drop to 80 or so. I am planning on getting it changed as it affects the fuel consumption as the engine doesn't get to the correct working temperature. It also appears to be worse when the weather is cold.
Some will also say it shouldn't move, period. Just keep an eye on it.