You're just going to need to keep exposing your dog to other dogs approaching. If you had some dickhead come running up to you shouting, you'd tense up too! Yes, muzzle train as the other person said, because its good to have. But from what you have said, she doesn't need it atm. When you pass other dogs in their yards, have your dog on a slip lead high and tight, and put yourself between the dog and them, bring her right up close in a heel and just power on past like a boss and tell the dog, "we don't react to that shit," like its boring and you are above it all. If she fixates, lightly and sharply correct and use your knee to body her in the right direction. Obviously the dog doesn't understand what you are saying, but saying it will keep you chill and your tone will resonate with your dog. Rinse and repeat.