No, bb/100 isn't really relevant in tournaments. Instead you'd be looking at your ROI.
And for sake of reference, ROI = Net Winnings/Total Buy-in x 100
Net Winnings = Total Winnings - Total Buy-in
Total Buy-in = Buy-in + Entry Fee
So, if you play in a $10+1 tourney and cash for $74, then
Total Buy-in = $10 + $1 = $11
Net Winnings = $74 - $11 = $63
ROI = $63/$11 x 100 = 572% ROI
If for that same game you barely cashed for $14, then
Total Buy-in = $10 + $1 = $11
Net Winnings = $14 - $11 = $3
ROI = $3/$11 x 100 = 27% ROI