Answer
$1034$
Work Step by Step
RECALL:
$M=1000
\\X=10
\\V=5
\\I=1$
Note that when a smaller numeral is written before a bigger numeral, the value of the smaller is subtracted to the value of the bigger numeral.
Thus,
$MXXXIV = 1000+10+10+10+(5-1) = 1034$