1,40,000 Rs. is his original Salary.
Let the original Salary of the man be = X
His New Salary = 1,54,000 Rs. (given)
X + (10/100 × X ) = 154000
X + (X/10) = 154000
11X / 10 =154000
X = 154000 × (10/11)
x = 140000
Hence we can say that his original Salary was 1,40,000 Rs.