With a screen width of 190 cm, an 85 inch diagonal is possible and would be 188 cm wide.
The best screen for this projector would be a 100 inch ARL (CRL) screen. With an ARL screen you can use the projector to its full potential and even watch in daylight.
100 inches is ideal for this projector, but if you don't have a wider wall, 100 inches is 222 cm wide.
Regards Jürg Wyss