Where is the number 1 spark plug located on engine of a 84 olds cutlass 3.8l?

The location of the number 1 spark plug on a 1984 Oldsmobile Cutlass with a 3.8L V6 engine is on the passenger side of the engine, at the front. However, "front" can be subjective depending on how you're looking at the engine. It's best to consult a repair manual or a diagram specific to your year and engine for a precise visual. Firing order also helps confirm. Look for a diagram showing the firing order (likely 1-6-5-4-3-2) to positively identify #1.