Many students ask me what fingerings do I use to play my high tones on the alto saxophone. 
 Here are the ones I've been using for the past 30 years they work great on any brand of Saxophone.  
To play the high range of the saxophone you must practice many sound exercises such as overtones,  bending tone,  and of course long tones. 
If you have any questions please feel free to write to me. 
 Alto saxophone fingering chart for the high register.

Alto saxophone fingering chart for the high register.