I know little about this stuff myself, but you might want to check out this German comparison chart. Monitors that have high scores for "Ergonomie" (80+) mostly can pivot; I googled the LG Flatron W2442PA and it can pivot.
http://www.chip.de/bestenlisten/Bestenliste-TFT-Monitore-24-Zoll-bis-1.000-%C2%80--index/detail/id/568/