100bb/100 would be good

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Seriously, if your talking about ptbb/100 and NL holdem, then if you play solid poker, aim for 5ptbb/100. That's what I try to set myself as a benchmark. Achieving this can be difficult and should be based on a relevant sample of hands, the more the better to get an accurate figure, 50k+ maybe. If you multi table a lot then expect the ptbb/100 to reduce the more you play. Obv achieving more than the figure mentioned is possible.
For someone who multi tables a lot and gets through many hands on a monthly basis, then they probably have to settle for a figure in the region of 3-4ptbb/100.