Explanation:

- To identify the odd pair, we need to find the consistent mathematical operation applied to the first number to get the second number and determine the pair that doesn't fit.

- Option 1: (87, 522)

- Check operation: $87\times 6=522$

- Option 2: (84, 672)

- Check operation: $84\times 8=672$

- Option 3: (92, 552)

- Check operation: $92\times 6=552$

- Option 4: (64, 384)

- Check operation: $64\times 6=384$

??The operation applied consistently in most options is multiplication by 6.

Option 2: (84, 672) doesn't follow this operation since it uses multiplication by 8.