inter-arrival times in exponential distributions

Arrivals occur following a Poisson distribution with a rate parameter of 84 arrivals per hour. Find: the probability that the time to arrival of the next customer is less than one minute.

When calculating the inter-arrival rate, would I have to convert it into minutes as the question is asking for the probability that is is less than an minute but the rate parameter has been given in terms of hours.

If this is the case, would the inter-arrival rate be 1/84 per hour; then converting into minutes would make it 0.714 minutes