You never mentioned the size of the unit, and the SEER rating, and how long was it running through the day, and location. All info needed to give a educated answer.
Otherwise, sure, it's hot.
Is it normal?
SEER is simply a formula that is described by the outcome of the -
Divide the system's rated Btu's by it's stated SEER rating to determine how many watts it consumes per hour, (Kwh stands for kilo-watt hour).
For that small space, probably 1 1/2 ton unit, unless in very humid normally very hot area. Which means perhaps properly sized, running almost constantly on these hot days.
Let's say it is old and only 12 SEER.
So that would be 1.5 Kwh. To hit 75 Kwh for the day, that means it ran for 50 hrs that day.
Since that can't be right, and over twice what it should be, -
your SEER value is way off my assumption and much worse.
You have a much bigger unit than my assumption and yet it is running constantly.
A combo of that.
The unit is very badly inefficient because of wrong air flow, blocked up filter or A-coil, thermo set to 60 F, bad charge, ect.
Once you get your figures, you can use that site to tell you if worth your while to upgrade to better SEER, now that you see the real money behind it. And that will most likely only go up too.