There are only a handful of Savanna view rooms on the 6th floor concierge level and they don't have the best view.
You can however, request a 5th floor room with a view of the arusha savanna - these are excellent rooms, with great views- the only drawback is that you are a floor below the lounge and it's a bit of a walk to the elevators.
I enjoyed my room on the kudu trail (5233) - I have some photos on my website link below.