I agree that drip or slow acclimation is the only safe way to ad fish to a tank. You can never trust the store to have similar pH, some managers put TONS of Alkalinity or Buffer blocks in their tanks, put tons of chemicals in, or just don't maintain the systems like they should. All of this leads to a change in pH, Alkalinity, and Hardness, all which can kill fish very quickly.
Your pH is OK for Neons, not perfect, but they will adjust to it. If you want to lower it, add some driftwood for consistency, but to be honest, those fish are probably already used to a 7.4-7.8 pH.
Now the big question is next time you go into Petco, ask them to test THEIR water and show you. That makes a huge difference!
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