How to generate random number in range of normal distribution in golang

I need to generate a value in range of truncated normal distribution, for example, in python you could use scipy.stats.truncnorm() to make

def get_truncated_normal(mean=.0, sd=1., low=.0, upp=10.):
    return truncnorm((low - mean) / sd, (upp - mean) / sd, loc=mean, scale=sd)

how it is described here

Is there any package to make something in go or should I write the following function myself?

I tried following, how the doc says, but it makes number not in the needed range:

func GenerateTruncatedNormal(mean, sd uint64) float64 {
    return rand.NormFloat64() * (float64)(sd + mean)
}

GenerateTruncatedNormal(10, 5)

makes 16.61, -14.54, or even 32.8, but I expect a small chance of getting 15 due to mean = 10 -> 10 + 5 = 15 is maximum value which we can get. What is wrong here? 😅