29C/84F is an excellent temperature for growing beneficial bacteria in the filter (!), not for fish usually. Typical compromise community tank temperatures are 24-26C.
That said, temp, like many other parameters is something the aquarist figures out based on the fish population. People can choose many types of fish and environments, so its hard to generalize about this.
I'd recommend a cheap glass tube encased traditional thermometer as an additional cross-check against the strip thermomter you've already obtained. It never hurts to have more than one thermometer. Heaters often have instructions for "calibrating" the little numerical knob that adjusts the set-point. Until that is done, the numbers don't usually necessarily correspond to reality.
Have you started your searches for a good liquid test kit and for the right kind of ammonia? Those will normally be your main tools to work with for the next month or two before you can have fish, right?
~~waterdrop~~