Maybe not the best solution, but here it is:
NSString *str1=@"Hello your bal = 68094";
NSArray *tempArray = [str1 componentsSeparatedByString:@"="];
str1 = [tempArray objectAtIndex:0];
NSLog(@"%@", str1);
Output:
2012-03-15 11:21:01.249 TestApp[1539:207] Hello your bal
Hope it helps